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Heat stress causes marginal burns on leaves of S. splendens King. Acclimated 8-week-old, healthy plants were exposed to a 40°C (13-h light period)/28°C (11-h dark period) cycle in an Intelligent Climate Incubator for 3 d. Control plants were cultivated under a 26°C (light)/20°C (dark) cycle. Light intensity was 400 μmol·m–2·s–1. The media were kept moist throughout the experiment.
